A.G. Barr plc (Lse - BAG) or commonly known as Barr's is a British soft drinks manufacturer, based in Cumbernauld, North Lanarkshire, Scotland. It is particularly notable for the manufacture of the popular Scottish drink, Irn-Bru. A.G. Barr is the largest manufacturer of soft drinks in the United Kingdom. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.